3. osm2go - Osm2go is an editor for http://OpenStreetMap.org . It allows you to download data from the OSM servers and view, modify and re-upload it. Intended for mapping on the road.
Help for users: http://wiki.openstreetmap.org/index.php/Osm2go

4. Gnuplot - Gnuplot is a command-line driven graphing utility. It was originally created to allow scientists and students to visualize mathematical functions and data interactively.
Touch screen support is ON. Use your fingers to play with the graphs!

11. Maegasquirt ECU Interface - Maegasquirt is an application to log information from the Megasquirt range of ECUs. Primarily it will use bluetooth to talk to an adapter plugged into the serial port of your ECU.

12. conspiracy-theory - conspiracy-theory aims to be a data visualization and manipulation tool. The end goal is to understand anything given to it as data and to provide an easy-to-use data visualization for the system.
In short, Everything is a plot.

17. Roadmap for Maemo - Roadmap for Maemo is a hildonized port of the program roadmap. homepage- http://roadmap.sourceforge.net/. It features OpenStreetMap.org downloads, Voice, Onboard maps, loadable state by state Tiger Maps, address search, and more...

19. GpsDrive - GpsDrive is a car (bike, ship, plane, foot) navigation system.
GpsDrive displays your position provided from a GPS on a zoomable map,
the map file is autoselected depending on your position and preferred
map scale. A POI management is also included.

20. Marble - Find your way and explore the world with Marble.
Marble is a virtual globe with advanced routing capabilities. Use it as your personal navigation device to guide you to any destination in the world. Record your trip and share it with your friends.